I ported the lzip file compression utility to OpenVOS Release 17.0.2 today. It uses an improved algorithm that gives better results than zip, gzip, or bzip2.  Some file-transfer sites, such as gnu.org, are starting to make files available in this format.

The source code, slightly modified to build on OpenVOS, is available from the VOS anonymous FTP server. Please visit http://ftp.stratus.com/pub/vos/posix/ga/v-series/v-series.html, and read the instructions on that page for downloading lzip and its prequisite packages.